A Cheese Sandwich's Journey Through the Digestive System

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Transcript of A Cheese Sandwich's Journey Through the Digestive System

The Digestive System A Cheese Sandwich'sJourney Through theDigestive System First, the food is placed into the mouth. It is chewed whilst saliva is produced to make the food into a paste. The amylase enzymes turn the starch molecules found in the bread into glucose. This is used by cells to give us energy. Different enzymes are needed for different food categories (e.g. protein, starch). First the molecule joins with the enzyme. The enzyme then breaks it down into products. These are then released into the body. The food enters the throat where muscles push it down into the esophagus which joins the throat and the stomach. The food enters the stomach where hydrochloric acids break the food down further. Protease enzymes break the proteins down into amino acids which help build up and repair muscles and tissue. These are the reason that proteins are so important to us and even more so to athletes.The second job of the stomach is to churn it all together into a mush . This is stored then finally released into the small intestine. Protease and amylase enzymes again break down the food until the nutrients such as glucose and fatty acids are small enough to pass through the villi from which they enter the bloodstream. The nutrients travel with the oxygen in the blood around the body to each of the cells. The cells produce energy using the oxygen and nutrients. The blood then carries the waste CO2 to the lungs where it is exhaled. The small intestine finally releases the waste products into the large intestine which is located around the small intestine. The small intestine is made up of three parts; the duodenum (where iron is absorbed), the jejunum (where amino acids and digested carbohydrates are absorbed) and the ileum (where vitamin B12 and bile salts are absorbed). The large intestine extracts the water from whats left and sends the rest (now known as faeces) on to the rectum where it is stored until they are passed on to the anus where the faeces are released. The rectum. Thank you for watching! The cheese sandwich is made up of bread, butter and cheese. The bread is made up of carbohydrates and fiber. The cheese is mainly made up of fat but also contains a little bit of protein as well as some vitamins and calcium. The butter is also mainly fat. A B 1 2 3 4 1 2 3 4 By Matthew Chambers, 7V3.